[wallet] Change default address type to bech32 (bitcoin#16884)

doc/release-notes-16884.md

@@ -0,0 +1,2 @@
+The wallet now by default uses bech32 addresses when using RPC, and creates native segwit
+change outputs.

src/interfaces/node.cpp

@@ -201,7 +201,6 @@ class NodeImpl : public Node
         return GuessVerificationProgress(Params().TxData(), tip);
     }
     bool isInitialBlockDownload() override { return ::ChainstateActive().IsInitialBlockDownload(); }
-    bool isAddressTypeSet() override { return !::gArgs.GetArg("-addresstype", "").empty(); }
     bool getReindex() override { return ::fReindex; }
     bool getImporting() override { return ::fImporting; }
     void setNetworkActive(bool active) override

src/interfaces/node.h

@@ -155,9 +155,6 @@ class Node
     //! Is initial block download.
     virtual bool isInitialBlockDownload() = 0;
 
-    //! Is -addresstype set.
-    virtual bool isAddressTypeSet() = 0;
-
     //! Get reindex.
     virtual bool getReindex() = 0;
 

src/qt/receivecoinsdialog.cpp

@@ -7,7 +7,6 @@
 #include <qt/receivecoinsdialog.h>
 #include <qt/forms/ui_receivecoinsdialog.h>
 
-#include <interfaces/node.h>
 #include <qt/addresstablemodel.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
@@ -93,16 +92,10 @@ void ReceiveCoinsDialog::setModel(WalletModel *_model)
         // Last 2 columns are set by the columnResizingFixer, when the table geometry is ready.
         columnResizingFixer = new GUIUtil::TableViewLastColumnResizingFixer(tableView, AMOUNT_MINIMUM_COLUMN_WIDTH, DATE_COLUMN_WIDTH, this);
 
-        if (model->node().isAddressTypeSet()) {
-            // user explicitly set the type, use it
-            if (model->wallet().getDefaultAddressType() == OutputType::BECH32) {
-                ui->useBech32->setCheckState(Qt::Checked);
-            } else {
-                ui->useBech32->setCheckState(Qt::Unchecked);
-            }
-        } else {
-            // Always fall back to bech32 in the gui
+        if (model->wallet().getDefaultAddressType() == OutputType::BECH32) {
             ui->useBech32->setCheckState(Qt::Checked);
+        } else {
+            ui->useBech32->setCheckState(Qt::Unchecked);
         }
 
         // Set the button to be enabled or disabled based on whether the wallet can give out new addresses.

src/wallet/wallet.h

@@ -120,7 +120,7 @@ enum WalletFeature
 };
 
 //! Default for -addresstype
-constexpr OutputType DEFAULT_ADDRESS_TYPE{OutputType::P2SH_SEGWIT};
+constexpr OutputType DEFAULT_ADDRESS_TYPE{OutputType::BECH32};
 
 //! Default for -changetype
 constexpr OutputType DEFAULT_CHANGE_TYPE{OutputType::CHANGE_AUTO};

test/functional/feature_bip68_sequence.py

@@ -29,9 +29,10 @@
 class BIP68Test(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 2
+        # TODO remove output type argument and fix resulting "tx-size-small" errors
         self.extra_args = [
-            ["-acceptnonstdtxn=1"],
-            ["-acceptnonstdtxn=0"],
+            ["-acceptnonstdtxn=1", "-addresstype=p2sh-segwit"],
+            ["-acceptnonstdtxn=0", "-addresstype=p2sh-segwit"],
         ]
 
     def skip_test_if_missing_module(self):

test/functional/feature_rbf.py

@@ -65,6 +65,7 @@ def make_utxo(node, amount, confirmed=True, scriptPubKey=CScript([1])):
 class ReplaceByFeeTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
+        # TODO remove output type argument and fix resulting "tx-size-small" errors
         self.extra_args = [
             [
                 "-acceptnonstdtxn=1",
@@ -73,6 +74,7 @@ def set_test_params(self):
                 "-limitancestorsize=101",
                 "-limitdescendantcount=200",
                 "-limitdescendantsize=101",
+                "-addresstype=p2sh-segwit",
             ],
         ]
 

test/functional/wallet_address_types.py

@@ -345,7 +345,7 @@ def run_test(self):
         self.sync_blocks()
         assert_equal(self.nodes[4].getbalance(), 1)
 
-        self.log.info("Nodes with addresstype=legacy never use a P2WPKH change output")
+        self.log.info("Nodes with addresstype=legacy never use a P2WPKH change output (unless changetype is set otherwise):")
         self.test_change_output_type(0, [to_address_bech32_1], 'legacy')
 
         self.log.info("Nodes with addresstype=p2sh-segwit only use a P2WPKH change output if any destination address is bech32:")

test/functional/wallet_basic.py

@@ -317,7 +317,7 @@ def run_test(self):
         assert_raises_rpc_error(-5, "Invalid private key encoding", self.nodes[0].importprivkey, "invalid")
 
         # This will raise an exception for importing an address with the PS2H flag
-        temp_address = self.nodes[1].getnewaddress()
+        temp_address = self.nodes[1].getnewaddress("", "p2sh-segwit")
         assert_raises_rpc_error(-5, "Cannot use the p2sh flag with an address - use a script instead", self.nodes[0].importaddress, temp_address, "label", False, True)
 
         # This will raise an exception for attempting to dump the private key of an address you do not own

test/functional/wallet_bumpfee.py

@@ -38,6 +38,7 @@ def set_test_params(self):
             "-walletrbf={}".format(i),
             "-mintxfee=0.00002",
             "-deprecatedrpc=totalFee",
+            "-addresstype=p2sh-segwit", # TODO update constants in test and remove
         ] for i in range(self.num_nodes)]
 
     def skip_test_if_missing_module(self):

test/functional/wallet_import_with_label.py

@@ -100,8 +100,8 @@ def run_test(self):
             "Test importprivkey won't label new dests with the same "
             "label as others labeled dests for the same key."
         )
-        self.log.info("Import a watch-only legacy address with a label.")
-        address4 = self.nodes[0].getnewaddress()
+        self.log.info("Import a watch-only p2sh-segwit address with a label.")
+        address4 = self.nodes[0].getnewaddress("", "p2sh-segwit")
         label4_addr = "Test Label 4 for importaddress"
         self.nodes[1].importaddress(address4, label4_addr)
         test_address(self.nodes[1],